Ac preventative maintenance on a heat pump from 2017, air filter size 20*20*1. System is in a closet, takes care of upstairs and downstairs but it only has one thermostat which is downstairs. Upon arrival the customer showed me where the equipment was and some of the repairs she’s had in the past. She mentioned that she changed the air filter at the beginning of the month and always changes it on the first of every month. She also said she treated her drain line recently because she’s had water issues a couple months ago. She also brought to my attention that the upstairs gets warmer than the downstairs but she knows heat rises, today we did close a vent to try to push more air to the other rooms upstairs. During my inspection the customer was with me the whole time and was able to see our maintenance process. I checked the electrical components and connections, showed the customer my readings on her compressor and fan motor. We did find a weak capacitor for the fan outside due to